Airtac SCJ50 Standard Cylinder SCJ50X170-75S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X170-75S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø50mm bore, 170mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke170 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X170-75S
The SCJ50X170-75S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a nominal 170 mm maximum reach that can be shortened by up to 75 mm via the rear-cap adjusting screw. This 50 mm bore actuator delivers a push force of 982 N at 0.5 MPa, making it a robust choice for applications requiring mid-range force with the flexibility to fine-tune the end position during commissioning or changeovers. The piston rod is 20 mm in diameter with an M16x1.5 thread, and the body length A is 194 mm.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG sensors on the tie-rod barrel for reliable, non-contact position feedback. The default TPU seal ensures smooth operation in standard temperatures from -20 to +70 °C, while the PT1/4 port threads and adjustable air cushion provide controlled deceleration. It is a genuine AirTAC component, precision-engineered for consistent, repeatable motion.
Airtac SCJ50 Standard Cylinder SCJ50X170-75S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X170-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 170 mm |
| Stroke adjustment | Up to 75 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X170-75S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×170 | Nominal (maximum) stroke length in mm. |
| -75 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ50 Standard Cylinder SCJ50X170-75S Is Used
Commissioning & Process Setup
Ideal for machine builders who need to precisely set a hard stop during initial setup. The 75 mm adjustment range allows engineers to fine-tune the actuator's end position for optimal part alignment without needing custom-length cylinders.
Adjustable Part Stops
Used on conveyor lines to create a retractable, adjustable end-stop for different product sizes. The screw adjustment lets operators quickly change the stopping position for a new batch, reducing changeover time.
Wear Compensation in Clamping
In clamping or pressing fixtures where tooling surfaces wear down over time, the adjustable stroke can be extended slightly to compensate for material loss, maintaining consistent clamping force without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X170-75S the Right Cylinder?
Choose the SCJ50X170-75S when you need to dial in a stroke end position without swapping hardware, particularly useful in setups where the exact stop point may vary between batches. For applications demanding higher force, consider stepping up to the 63 mm bore SCJ63 series, which provides 1559 N of push force at the same 0.5 MPa pressure. If your application does not require stroke adjustability, the fixed-stroke SC50 series offers a more compact and cost-effective alternative. For a direct replacement, match this cylinder with another SCJ50 of identical 170 mm nominal stroke, 75 mm adjustment range, PT port thread, and the -S magnet option. Given the 170 mm stroke, ensure the load is guided externally if significant side forces are present to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-75)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X170-75S FAQ
At 0.5 MPa, the cylinder provides 982 N of push force and 825 N of pull force. The rear adjusting screw only changes the physical stroke end position and does not alter the cylinder's bore, rod diameter, or operating pressure, so the output force remains constant regardless of the stroke adjustment setting.
A standard SC50 cylinder has a fixed stroke and lacks the rear adjusting mechanism. You can only replace this unit with another SCJ50 adjustable-stroke cylinder that matches the 170 mm nominal stroke, the 75 mm adjustment range, and the -S magnet option to ensure identical fit, function, and sensor compatibility.
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